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ROTARY ENGINE.

(Application filed May 26, 1897,) (No ModeL) 3 Sheets-Sheet l.

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ROTARY ENGINE. (Appliciztion mam; 25, 1897.)

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Patented Nov. 29, I898.

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. C. G. TAYLOR.

ROTARY ENGINE.

(Application mean 25, 1391.

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NITED STATES PATENT OFFICE.-

CHARLES Gr. TAYLOR, OF BURLINGAME, KANSAS, ASSIGNOR OF ONE- TIVELFTI'I TO CHARLES G. AINSLIE, OF SAME PLACE.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 615,114, dated November 29, 1898. Application filed May 25, 1897. Serial No. 639,076. (No model.)

To all whom it Wtay concern:

Be it known that I, CHARLES G. TAYLOR, of Burlingame, in the county of Osage and State of Kansas, have invented a new and Improved Rotary Engine, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved rotary enginewhich is simple and durable in construction, very efiective in operation, and arranged to utilize the motive agent to the fullest advantage and to permit of conveniently reversing the engine whenever desired.

The invention consists principally of a cylinder in which is mounted to rotate a piston provided with a piston-head, a spring-pressed abutment fitted to slide in the said cylinder, cams for moving the said abutment outwardly against the tension of the springs, and valves for controlling the inlet and exhaust of the steam to and from the said cylinder.

The invention also consists of certain parts and details and combinations of the same, as will be fully described hereinafter and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is an end elevation of the improvement. Fig. 2 is a longitudinal section of the same. Fig. 3 is a plan view of the cylinder with the abutments in position. Fig. 4 is a cross-section of the same on the line 4B 4 of Fig. 2. Fig. 5 is a side elevation of the piston. Fig. 6 is a sectional side elevation of the valve-gear on the line 6 6 of Fig. 1, and Fig. 7 is a cross-section of the rocking lever.

The improved rotary engine is provided with a cylinder A, in which is mounted to turn a double piston B B, secured on the main driving-shaft C, journaled in suitable bearings arranged in the cylinder-heads. The pistons B B are concentric within the cylinder A and are provided with piston-heads l3 and B respectively, arranged diametrically opposite each other, as plainly shown in Figs. 2 and 4, and the said piston-heads are pressed outwardly into the working space of the cylinder by springs B, so that the outer ends of thesaid heads are in firm contact with the inner surface of the cylinder, and the said outer ends are provided with suitable packings to prevent leakage of steam from one side of the head to the other.

The pistons B and B are further provided with flanges at the ends and middle, so as to form two complete working chambers in the cylinder, one for each piston.

In the top of the cylinder is formed a radially-disposed guideway A for the abutments D and D to slide in, the abutment D operating in conjunction with the piston B and its head B and the other abutment operating in conjunction with the piston B and its head B The abutments D and D are held with their inner ends in peripheral contact with the said pistons by springs D and D respectively; but in order to let the piston-heads l3 and B pass the said abutments the latter are moved outwardly by mechan= ical means, the said abutments being for this purpose provided with arms D and D respectively, carrying at their inner ends friction-rollers E and E, respectively, in engagement with the peripheral surfaces of cams B and B, respectively, formed on the pistons B and B. The cams are so formed that when the piston-head 13 or B approaches the corresponding abutment the latter is moved outwardly in the guideway A against the tension of its springs D D and when the head has passed the abutment the said springs return the abutment to an innermost position, so that there are always two chambers formed in each working chamber of the cylinder between the corresponding abutment and piston.

In the cylinder are formed two sets of ports a and b, one set for each working chamber, and in the said ports are arranged the cut-off valves F and F, respectively, for admitting steam to the working chambers at either side of the abutments D and D, according to the direction in which the engine is to run. The

ports a and I? connect with the steam-chests G and G, having inlet-valves H and H, respectively, connected with the supply-pipe I, leading to'a boiler or other suitable source of steam-supply. One of the valves H or H is open while the other is closed, so that steam passes at the same time from the supply-pipe to either of the two chests G and G and from the latter through the corresponding port a or b and cut-off valve F or F into the cylinder to either the left or right hand side of the abutments D D.

As shown in Fig. 4, the valve ll is open, so that the steam can pass from the supply-pipe I through the valve II into the chest G, and from the latter through the port a and valve F to the cylinder A on the left-hand side of the abutments D and D to rotate the piston in the direction of the arrow a. \Vhen the valve II is closed and the other valve II is open, then the live steam passes from the supply-pipe I through the chest G and port I; and cut-off valve F into the cylinder A on the right-hand side of the abutments to rotate the piston in the inverse direction of the arrow a. On opposite sides of the abutments are also arranged the exhaust-ports c and d, leading to an exhaust-valve J, connected with the exhaustchamber K, from which leads the pipe K to the outside. The valve J is provided on its valve-stem with a handle J, adapted to be turned by the operator so as to connect the chamber K with either of the two exhaust-ports c and (1, according to whichever valve H or H is open.

As shown in Fig. 4, the valve J connects the chamber K with the exhaust-port d. The cut-off valves F and F are actuated from the shaft 0, and their movement is controlled from the governor of the engine, and for this purpose the valve is made as shown in the drawings, special reference being had to Figs. 1 and 6. On the outer ends of the valvestems of the said valves F F are secured crank-arms 1* F respectively, having their wrist-pins engaging slots in the rearwardlybent ends L (see Fig.7) of a lever L, fulcrumed at its middle at L on one of the cylinder-heads. The lever L is formed near one end with a segmental slot L in which is fitted to slide a transverse block or pin N, carried at its outer end by the eccentric-rod O of an eccentric O, secured to the shaft 0. The block N projects through a slot I formed in the outer end of one arm of a bell-crank lever P, fulcrumed on the cylinder-head and pivotally connected at its other arm with the governor-stem Q of a governor (not shown) of any approved construction and driven from the shaft 0.

Now when the engine is in motion the cocentric 0 will impart a swinging motion to the lever L, so as to cause a rocking of the valves F and F to admit or cut off the steam at the ports a or Z), and the amount of cutoif depends on the position of the block N, controlled from the governor by the stem Q and lever P. Thus when the block N is moved nearer to the fulcrum L the cut-off takes place sooner, and when the block N is moved farther outward the cut-off takes place later that is, a less amount of steam is admitted in one case and more in the other, according to the speed of the engine. Starting-valves R and R are interposed between the chests G G and the exhaust-ports c d, respectively, the said valves being provided at their outer ends with handles under the control of the operator; but the said valves are normally closed and are only opened in starting, the engine and in case the valves F and F are both in a closed position. In this case the steam from the chest G or G can be passed by the valve R or R into the corresponding exhaust-port c or d to pass through the latter into the cylinder to act on the corresponding piston-head, so as to rotate the piston in the direction of the arrow a or the inverse direction thereof.

I do not limit myself to the particular construction shown and described for positively moving the abutments outward, as it is evident that other suitable means may be employed for this purpose.

The flanges of the piston B B are provided with the usual packing-rings to prevent leakage of steam from one working chamber to the other, and the piston-heads are also provided with suitable packings, as before mentioned.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent-- 1. In a rotary engine, the combination with a cylinder, of a piston in the cylinder and provided with a radial piston-head and with a cam at each end, and a spring-pressed abutment held to slide in the cylinder and provided with an arm at each end adapted to be engaged by the cams of the piston at the approach of the head of said piston, substantially as described.

2. In a rotary engine, the combination with a cylinder, of a double piston mounted in the cylinder and each provided with a radially-extending piston-head and with a cam at each end, spring-pressed abutments held to slide in the cylinder and each provided with an arm at each end, adapted to be engaged by the cams of the piston at the approach of the heads of said piston, cut-off valves connected with the supply and exhaust and with the cylinder on opposite sides of the abutments, and means for operating the said Valves from the main driving-shaft substantially as described.

3. Arotary engine, comprising a cylinder, a double piston mounted to turn concentrically in the said cylinder and each provided with a radially-extending piston-head and with a cam at each end, spring-pressed abutments held to slide in the cylinder and each provided with an arm at each end adapted to be engaged by the cams of the piston at the approach of the piston-head, cut-ofif valves connected with the supply and exhaust and with the said cylinder on opposite sides of the said abutments, a rocking lever connected with said valves, and means for operating said le- IIC ver from the main drive-shaft, substantially as described.

4. A rotary engine comprising a cylinder, a piston mounted to turn concentrically in the said cylinder and provided with a radial piston-head extending to the inner surface of the cylinder, a spring-pressed abutment held to slide in the said cylinder against the peripheral surface of the said piston and its head, means substantially as described, for moving the said abutment outwardly against the tension of its springs and at the approach of the said head, cut-off valves connected with the supply and exhaust and with the said cylinder on opposite sides of the said abutments, a lever connected with the saidvalves for rocking the same, a slide-block in the said lever, and an eccentric on the main shaft and connected with the saidblock to impart a rocking motion to the lever and the valves, substantially as shown and described.

5. A rotary engine comprising a cylinder, a piston mounted to turn concentrically in the said cylinder and provided with a radial piston-head extending to the inner surface of the cylinder, a spring-pressed abutment held to slide in the said cylinder against the peripheral surface of the said piston and its head, means substantially as described, for moving the said abutment outwardly against the tension of its springs and at the approach of the said head, cut-off valves connected with the supply and exhaust and with the said cylinder on opposite sides of the said abutments, a lever connected with the said valves for rocking the same, a slide-block in the said lever, an eccentric on the main shaft and connected with the said blockto impart a rocking motion to the lever and the valves, and a lever controlled by the governor-stem and connected with the said block to shift the same in the said lever, substantially as shown and described.

6. A rotary engine comprising a cylinder, a piston mounted to turn concentrically in the said cylinder and provided with a radial piston-head extending to the inner surface of the cylinder, a spring-pressed abutment held to slide in the said cylinder against the peripheral surface of the said piston and its head, means substantially as described, for moving-the said abutment outwardly against the tension of its springs and at the approach of the said head, cut-off valves connected with the said cylinder on opposite sides of the said abutment, and a rocking lever connected with the said cut-off valves and with the stem of a governor, substantially as shown and described.

7. A rotary engine comprising a cylinder, a piston mounted to turn concentrically in the said cylinder and provided with a radial piston-head extending to the inner surface of the cylinder, a spring-pressed abutment held to slide in the said cylinder against the peripheral surface of the said piston and its head, means substantially as described, for moving the said abutment outwardly against the tension of its springs and at the approach of the said head, cut-off valves connected with the said cylinder on opposite sides of the said abutment, a rocking lever connected with the said cut-off valves and with a governor-stem, and a set of auxiliary or starting valves for connecting the exhaust-ports with the said inlet-valves, substantially as shown and described.

CHARLES G. TAYLOR. 

